https://doi.org/10.1140/epja/i2006-10068-x
Nuclear Astrophysics
Change of the 7Be electron capture half-life in metallic environments
1
China Institute of Atomic Energy, Beijing, PRC
2
Dipartimento di Scienze Ambientale, Seconda Università di Napoli, Caserta, Italy
3
INFN, Napoli, Italy
4
Experimentalphysik III, Ruhr-Universität Bochum, Bochum, Germany
5
School of Physics, University of Edinburgh, UK
6
Dynamitron-Tandem-Laboratorium, Ruhr-Universität Bochum, Bochum, Germany
7
Centro de Fısica Nuclear, Universidade de Lisboa, Portugal
8
Dipartimento di Scienze della Vita, Seconda Università di Napoli, Caserta, Italy
9
Atomki, Debrecen, Hungary
10
Dipartimento di Scienze Fisiche, Università Federico II, Napoli, Italy
* e-mail: rolfs@ep3.rub.de
Received:
3
May
2006
Accepted:
8
July
2006
Published online:
14
July
2006
For the electron capture of 7Be in the metallic environments Pd and In the 7Be half-life was observed to increase by 0.9±0.2 and 0.7±0.2%, respectively, while in the insulator Li2O it was unchanged within experimental error (all samples cooled to T = 12K). The observations are consistent with the predictions of the Debye plasma model applied to the quasi-free electrons in the metals.
PACS: 26.20.+f Hydrostatic stellar nucleosynthesis – / 27.30.+t 20 ⩽ A ⩽ 38 – / 21.10.Tg Lifetimes –
© Società Italiana di Fisica and Springer-Verlag, 2006